I'm grasping at straws here, but usually when I find the upload hangs, it's for one of two reasons. First, I don't have the CH340 driver installed. Many clones don't use the expensive UART of the original Nano, hence the need for the driver. Just google "CH340 download". Second, the chip was shipped with an early bootloader. If that's the case, the Tools menu will have a bootloader option. Try the ATMega328 (old bootloader), reload the IDE and see if that fixes it. (I don't have one that causes the bootloader menu to appear any more, but it's under the Tools menu.)
Let people know if either helps.
Jack, W8TEE
On Friday, November 23, 2018, 3:06:11 PM EST, Woody <mailme@...> wrote:
Will welcome any suggestions...
History:
Using UBITX_CEC_V1.080_16P.hex. Original Raduino died during transmitter
testing.??? Display: Top row all filled characters, Bottom row no
characters.? This is what is displayed while waiting for boot to
complete with working unit...? Tried to reload firmware...
UBITX Manager: Connects OK (38,400 baud), but READ UBITX returns error -
[6:31] ERROR RECEIVE LENGTH = 0/1027
Reset does not return error.?? After "reset ubitx", reconnect and tried
to upload original btx file - reported success...
Then...
Using XLOADER, tried uploading UBITX_CEC_V1.080_16P.hex again (57,600
baud, at 38,400 - can't open port)? ---? Tries to upload, but stuck at
"uploading...", never completes.
So...? Ordered new Raduino kit from W0EB.? Different problem: Display
lights, no characters either row.
----
Memory manager connects, Read ubitx seems to work.? Got data and the
info: [6:57 PM] Check sum compare 57:57
[6:57 PM] READ SAMPLE :
02,D2,DD,FF,FF,00,00,00,00,B2,0E,B7,00,00,00,00,00,10,93,6B,00,C8,09,6F,00,00,00,00,00,0E,00,00,
Memory Manager
Reset seems to work.
Loading btx from file reports "success".
Using Xloader, loaded UBITX_CEC_V1.080_16P.hex,? apparently successful.
Lit, but still blank display.
--------------------------------------------------------------------------------------------------------
THEN... Put the new arduino nano (from W0EB) in the original Raduino
board.?? Seems to work!
--------------------------------------------------------------------------------------------------------
Apparently I have two issues.? A bad Nano in original, and something
wrong with my new kit.
I have carefully examined all solder joints using 10x eye loop and 20x
stereo microscope.? No bridging, joints look OK.
Two questions:
1) Any suggestions about why the original Nano died?? Don't want a repeat!
2) What could be causing the lit but blank display on the new kit?
Thanks for any suggestions.
Woody,? KZ4AK
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